The IOPE Air Cushion puff is good.

This is a puff specifically designed for IOPE Air Cushion that I purchased at Aritaum. It applies well and moisturizes even when used with foundation or other cushion products, not just Air Cushion. Since puffs touch the skin, hygiene is important, so I keep spares on hand and replace them regularly. I recommend this puff because it ensures excellent adhesion without any caking.